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Dynamic image distribution system, dynamic image distribution method and dynamic image distribution program

a dynamic image and distribution system technology, applied in the direction of television systems, instruments, electrical appliances, etc., can solve the problems of inability to perform independent decoding for one frame, inability to dynamically change the viewing range, and inability to perform interactive processing such as viewing by, image and dynamically changing the viewing rang

Active Publication Date: 2013-08-22
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text explains a new technology that can improve the accuracy and reliability of a specific type of sensor. This technology involves using a special coating on the surface of the sensor to reduce interference from the environment. This coating helps to make the sensor more reliable and accurate, which can be useful in a wide range of applications.

Problems solved by technology

However, because the P picture and the B picture require, in advance, image data to be used for a prediction in the interframe prediction for decoding, the independent decoding for one frame cannot be performed.
Though accumulation of a dynamic image, and transmission thereof or the like has become facilitated by these dynamic image compression technologies, different from the incompressible image, interactive processing such as viewing by cutting out only a certain area of an image and changing a viewing range dynamically cannot be realized easily.
Here, assuming that, for example, when a high-resolution image of 8K×4K (8192×4096 pixels) is watched on a small size screen (640×480 pixels, for example) of a cellular phone, an object to see is displayed in a very small size compared with a background image when a whole image content is displayed entirely in accordance with the screen size, and a visual recognition of the object may be difficult.
However, for the video signal, for which compression coding was performed, because the video signal has been coded by using spatial and temporal correlations in a dynamic image, cutting only a part of the video signal to be decoded and to be displayed is difficult.
However, the method (A) requires a high-performance decoding device capable of performing the decoding process for a dynamic image larger than the display size of the receiving device, and the transmission path band is unnecessarily consumed.
Furthermore, there is a problem that the coding devices, a number of which corresponds to the maximum number of the receivers connected simultaneously, must be provided.

Method used

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  • Dynamic image distribution system, dynamic image distribution method and dynamic image distribution program
  • Dynamic image distribution system, dynamic image distribution method and dynamic image distribution program
  • Dynamic image distribution system, dynamic image distribution method and dynamic image distribution program

Examples

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first exemplary embodiment

[0046]A first exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 shows an example of a configuration of a dynamic image distribution system according to a first exemplary embodiment of the present invention. FIG. 2 describes an example of a management method of image information in the first exemplary embodiment of the present invention.

[0047]Each frame of a compression-encoded dynamic image is divided into multiple partial regions and is managed, in the first exemplary embodiment of the present invention with reference to FIG. 2. In this specification, this partial region is called a tile. In compression coding of a dynamic image, a frame of image is divided into blocks with a size of 16×16 pixels and coding processing is performed. A block of these 16×16 pixels is a unit for coding processing called a macro block (referred to as MB, in the following). As shown in FIG. 2, the tile includes a set of one or more MBs, and one or more...

second exemplary embodiment

[0053]Next, a second exemplary embodiment of the present invention will be described with reference to FIG. 6 and FIG. 7. The configuration of the system and the operation flow are similar to the first exemplary embodiment of the present invention.

[0054]Here, FIG. 6 shows an example of processing which displays an area of 160×80 pixels of the center of a frame in the head synthesized frame 0, and moves a display region to the upper left based on operation from the receiver in the next synthesized frame 1. FIG. 7 shows processing in the transmitter 100. The processing, which determines a minimum tile group needed to cover a display region, is similar to the first exemplary embodiment. In this example, even if the display region scrolls, because the configuration of the tile group which covers it does not change, the synthesized frame 0 and the synthesized frame 1 use eighteen tiles which were assigned numbers of 6, 7, 8, 11, 12, 13, 16, 17, 18, 21, 22, 23, 26, 27, 28, 31, 32 and 33. ...

third exemplary embodiment

[0056]Next, a third exemplary embodiment of the present invention will be described with reference to FIGS. 8 to 11. The configuration of the system and the operation flow are similar to the first exemplary embodiment of the present invention.

[0057]FIG. 8 shows an example of processing which displays an area of 160×80 pixels of the center of the frame in the head synthesized frame 0 and moves (scrolls) a display region to the upper left further rather than the case of the example of FIG. 6 based on the operation from the receiver in the next synthesized frame 1. FIG. 9 shows processing in the transmitter 100. In this example, when the display region scrolls, a configuration of a tile group which covers the display region changes. That is, twenty-four tiles assigned numbers of 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18, 20, 21, 22, 23, 25, 26, 27 and 28, are used in the synthesized frame 1 after scrolling. Because the same numbers, that is, tiles at the same positions exi...

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Abstract

[Problem] To provide a dynamic image distribution system, dynamic image distribution method, and dynamic image distribution program enabling the arbitrary setting of a viewing range for compression-encoded dynamic images and the interactive modification of the viewing range.[Solution] A dynamic image distribution system manages compression-encoded dynamic images as a group of tiles, each containing at least one macro block. The dynamic image distribution system is provided with: a transmitter for managing the display region of the dynamic image and, on the basis of the display region, reads a tile from the stored group of tiles and subjects the tile to correction processing, before synthesizing and transmitting a dynamic image bit stream of one frame from the processed tile; and a receiver for receiving and decoding the dynamic image bit stream, displaying the decoded dynamic image, inputting a user operation and transmitting the user operation to the transmitter.

Description

TECHNICAL FIELD[0001]The present invention relates to a dynamic image distribution system, a dynamic image distribution method and a dynamic image distribution program, and in particular relates to a dynamic image distribution system, a dynamic image distribution method and a dynamic image distribution program that can arbitrarily set a viewing range and interactively change the viewing range.BACKGROUND ART[0002]In recent years, digitalization of dynamic image data has developed, and performing compression coding for a dynamic image signal to treat has become general. As a technology for coding a dynamic image signal with a low bit rate, a high compression rate, and high definition, to generate coding data, or decoding the coded dynamic image, H.261 and H.263, standardized by the ITU (International Telecommunication Union), MPEG-1 (Moving Picture Experts Group-1), MPEG-2 and MPEG-4 by the ISO (International Organization for Standardization), and VC-1 by the SMPTE (Society of Motion ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N7/26H04N19/102H04N19/105H04N19/114H04N19/132H04N19/162H04N19/164H04N19/167H04N19/172H04N19/174H04N19/176H04N19/196H04N19/25H04N19/46H04N19/463H04N19/48H04N19/50H04N19/503H04N19/513H04N19/52H04N19/593H04N19/70
CPCH04N19/00903H04N19/85H04N19/513H04N19/61H04N19/40H04N19/164H04N19/174H04N19/167H04N19/132
Inventor MORIYOSHI, TATSUJI
Owner NEC CORP